Seeing as this thread has risen from the dust, I'll chuck in a few favoured oldies:
King Crimson - Epitaph. Album: In The Court Of The Crimson King, 1969
Jimi Hendrix - Machine Gun. Album: Band Of Gypsys, 1970.
Picking a Hendrix track is akin to choosing in a Miss World pageant, but Machine Gun gets the nod. Material in short supply on the 'tube, linked to Vimeo for this one.
Bauhaus - Double Dare. Album: In The Flat Field, 1981
The Who - Love Reign O'er Me. Album: Quadrophenia, 1973
Deep Purple - Child In Time. Album: In Rock, 1970
Funkadelic - Maggot Brain. Album: Maggot Brain, 1971